Tag: "abrupt" at biology news

... Parkinson's were made in a way that causes a very abrupt death of the dopamine nerve cells--a process that doesn't resemble the slow, progressive nature of Parkinson's disease in humans." So Zigmond and his colleagues re-did the study, this time injecting the neurotoxin--6-hydroxydopamine (6-OHDA), which ...

... examined how they might deal with possible future abrupt climate change. The groups included scientific officers at DEFRA, representatives of the Environment Agency and the Welsh Assembly and members of a dairy farmers' cooperative. The data collected from interviews, focus groups and workshops suggest...

...:50am, Location: Great Hall Center. The causes of abrupt climate changes are not understood. Paleoclimatic ...rge changes in ecosystems. Given the likelihood of abrupt climate changes in the future, we consider their potential impacts on ecosystems and the implication...

...ure extremes. The fungi were exposed to either an abrupt or gradual increase in this atmospheric gas. The g...ty of the fungi than did the group exposed to the abrupt change, but the difference was not significant. The findings suggest that previous work has overest...

...eases, the degradation of water supplies and other abrupt changes that will seriously affect human health, the report states. "In the past, we were able to feed enough people and maintain a steadily growing consumption of goods but at great expense to the environment," Sala said. "This report clearly shows...

...n) This research draws attention to the effect of abrupt climate change on a major event in human history, the invention of agriculture. By using time-scale analysis of model and other data, researchers argue that climatic changes were too great and too frequent to permit the development of a successful ag...

...ir body sway reduced. The authors found that this abrupt reaction, so critical for the survival of some animals, has stayed with humans. Forty-eight male volunteers stood barefoot on a stabilometric platform, to measure balance and body sway, and viewed twenty-four pictures from three different categorie...

...ut no changes in the diet and environment until an abrupt transition was noted that corresponded to the arrival of humans. "Humans are the major suspect," commented Fogel. "However, we don't think that over-hunting or new diseases are to blame for the extinctions, because our research sees the ecological tr...

...ices. Researchers believe that the ERN reflects an abrupt dip in signaling between neurons that depend on the neurotransmitter dopamine. A key question, though, has been exactly what kind of processing ERNs reflect in the ACC. While one theory holds that ERNs reflect a mechanism by which the brain detects e...

...istory. The work gives support to a theory that an abrupt and dramatic rise in atmospheric levels of carbon dioxide triggered the massive die-off 251 million years ago. The research appears in the September issue of Geology. "The results demonstrate how rapidly rising temperatures in the atmosphere can affe...

...s may segregate into small sub-bundles, or undergo abrupt unbinding transitions. (Physical Review Letters 95, 038102, July, 2005). Biological cells are mechanically stable because they contain actin filaments and microtubules that form networks and bundles. These filament architectures are determined and c...

... past ice ages also provides indirect evidence for abrupt climate change in the past, the authors found. This suggests that abrupt climatic events on time scales relevant to societies may be common features of the last climatic cyc...

...graphic change we detected is characterized by an abrupt 20 to 30 percent increase, over 500 to 700 years, in the proportion of immature skeletons." While prior research has been done on the Neolithic Demographic Transition, as the increase in birth rate is known, Bocquet-Appel and Stephan Naji are the fir...

...ity is a scenario in which the virus mutates in an abrupt manner, resulting in human-to-human transmission. If that occurred, he said, the number of human deaths tallied would likely be "on a wider scale than any attack by humans on humans other than nuclear war." "People think of international security as...

The majority of tiny marine plants weathered the abrupt climate changes that occurred in Earth's past and ...ulations of these plankton during three periods of abrupt climate change. These abrupt changes were caused either by Oceanic Anoxic Events during the middle ...

...suggests there could be some dramatic, potentially abrupt changes in store. "There's an awful lot of knowledge we can gain from past climates," says Mark Chandler, an atmospheric scientist at Columbia University. He has been studying a warming episode 3 million years ago during a period called the Middle Pl...

...olds that, once tipped, could lead to large-scale, abrupt changes. Noone will describe the kind of systems-l...h was once a region of rich vegetation, before its abrupt collapse about 6000 years ago. Stefan Rahmstorf, Potsdam Institute for Climate Impact Research, Germ...

...od in the northeast Atlantic repeatedly experience abrupt temperature changes of up to 8C, suggesting that temperature may not be so crucial in constraining the movements and distribution of adult cod", explains Dr Metcalfe, "However this doesn't mean that climate change won't impact the numbers or distribu...

...Downs syndrome) as women age, and with a seemingly abrupt end of fertility around perimenopause. Our researc...fferent. Men seem to have a gradual rather than an abrupt change in fertility and in the potential ability to produce viable healthy offspring." Unlike in wo...

(Date:3/23/2015)... -- In the 2014 fiscal year, irs.gov recorded over $100 ... accounts for a fraction of the estimated losses for ... $11 billion globally. The polygraph has traditionally been used ... Investor Mark Saint Juste along with former ... partnered to administer the test in a new way: ...